Wikipedia
Ptx (Unix)
ptx is a Unix utility, named for the permuted index which can perform the function of the Keyword in Context ( KWIC) search mode. There is a corresponding IBM mainframe utility which performs the same function. permuted indexes are often used in such places as bibliographic or medical databases, thesauruses, or web sites to aid in locating entries of interest.
PTX
PTX may refer to:
PTX (album)
PTX is the second studio album by American a cappella band Pentatonix. Released on 19 September 2014 via RCA Records, the work contains songs from PTX Volumes 1 & 2, cover songs from YouTube and seven new Pentatonix songs.